Mahmudah M, Irawati TN, Aini FBN. Polyalphabetic cipher cryptosystem application in making anti-hacker passwords learning management systems in junior high schools. Alifmatika J. Pendidik. dan Pembelajaran Mat. [Internet]. 2024Jun.30 [cited 2024Jul.16];6(1):90-103. Available from: https://journal.ibrahimy.ac.id/index.php/Alifmatika/article/view/4696